/*
 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
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 *
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 *
 */
package javax.swing;

import java.awt.Component;
import java.awt.Container;
import java.awt.Rectangle;
import java.awt.event.PaintEvent;
import java.security.AccessController;
import sun.awt.AppContext;
import sun.awt.SunToolkit;
import sun.awt.event.IgnorePaintEvent;
import sun.security.action.GetBooleanAction;
import sun.security.action.GetPropertyAction;

/**
 * Swing's PaintEventDispatcher.  If the component specified by the PaintEvent
 * is a top level Swing component (JFrame, JWindow, JDialog, JApplet), this
 * will forward the request to the RepaintManager for eventual painting.
 */
class SwingPaintEventDispatcher extends sun.awt.PaintEventDispatcher {

  private static final boolean SHOW_FROM_DOUBLE_BUFFER;
  private static final boolean ERASE_BACKGROUND;

  static {
    SHOW_FROM_DOUBLE_BUFFER = "true".equals(AccessController.doPrivileged(
        new GetPropertyAction("swing.showFromDoubleBuffer", "true")));
    ERASE_BACKGROUND = AccessController.doPrivileged(
        new GetBooleanAction("swing.nativeErase"));
  }

  public PaintEvent createPaintEvent(Component component, int x, int y,
      int w, int h) {
    if (component instanceof RootPaneContainer) {
      AppContext appContext = SunToolkit.targetToAppContext(component);
      RepaintManager rm = RepaintManager.currentManager(appContext);
      if (!SHOW_FROM_DOUBLE_BUFFER ||
          !rm.show((Container) component, x, y, w, h)) {
        rm.nativeAddDirtyRegion(appContext, (Container) component,
            x, y, w, h);
      }
      // For backward compatibility generate an empty paint
      // event.  Not doing this broke parts of Netbeans.
      return new IgnorePaintEvent(component, PaintEvent.PAINT,
          new Rectangle(x, y, w, h));
    } else if (component instanceof SwingHeavyWeight) {
      AppContext appContext = SunToolkit.targetToAppContext(component);
      RepaintManager rm = RepaintManager.currentManager(appContext);
      rm.nativeAddDirtyRegion(appContext, (Container) component,
          x, y, w, h);
      return new IgnorePaintEvent(component, PaintEvent.PAINT,
          new Rectangle(x, y, w, h));
    }
    return super.createPaintEvent(component, x, y, w, h);
  }

  public boolean shouldDoNativeBackgroundErase(Component c) {
    return ERASE_BACKGROUND || !(c instanceof RootPaneContainer);
  }

  public boolean queueSurfaceDataReplacing(Component c, Runnable r) {
    if (c instanceof RootPaneContainer) {
      AppContext appContext = SunToolkit.targetToAppContext(c);
      RepaintManager.currentManager(appContext).
          nativeQueueSurfaceDataRunnable(appContext, c, r);
      return true;
    }
    return super.queueSurfaceDataReplacing(c, r);
  }
}
